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Linux/tools/testing/selftests/bpf/sample_map_ret0.c

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  1 /* SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) */
  2 #include <linux/bpf.h>
  3 #include "bpf_helpers.h"
  4 
  5 struct bpf_map_def SEC("maps") htab = {
  6         .type = BPF_MAP_TYPE_HASH,
  7         .key_size = sizeof(__u32),
  8         .value_size = sizeof(long),
  9         .max_entries = 2,
 10 };
 11 
 12 struct bpf_map_def SEC("maps") array = {
 13         .type = BPF_MAP_TYPE_ARRAY,
 14         .key_size = sizeof(__u32),
 15         .value_size = sizeof(long),
 16         .max_entries = 2,
 17 };
 18 
 19 /* Sample program which should always load for testing control paths. */
 20 SEC(".text") int func()
 21 {
 22         __u64 key64 = 0;
 23         __u32 key = 0;
 24         long *value;
 25 
 26         value = bpf_map_lookup_elem(&htab, &key);
 27         if (!value)
 28                 return 1;
 29         value = bpf_map_lookup_elem(&array, &key64);
 30         if (!value)
 31                 return 1;
 32 
 33         return 0;
 34 }
 35 

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